Go drive it down a dirt or gravel road, hit the brakes hard a few times so the ABS kicks in.
This will get the solenoids working and should expel some air out of the ABS pump if there is any in there.
Then go bleed it again with the engine running.
If this fails then maybe you have a faulty master cylinder.

If it's under warranty then don't worry, it's their problem to find and fit an engine if it needs one. Don't let them fob you off with excuses.
Or get your money back and go elsewhere for a better car.